buglwIP - A Lightweight TCP/IP stack - Bugs: bug #47792, Cache neighbor_index per...


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bug #47792: Cache neighbor_index per destination_cache entry

Submitted by:  Simon Goldschmidt <goldsimon>
Submitted on:  Wed 27 Apr 2016 10:40:57 AM UTC  
Category:  IPv6 Severity:  2 - Minor
Item Group:  Feature Request Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open Planned Release:  None
lwIP version:  git head

Wed 27 Apr 2016 10:40:57 AM UTC, original submission:

The current nd6 caching mechanism uses HWADDRHINT to cache destination index per pcb, but the corresponding neighbor cache entry is cached globally.

This means when we have 2 concurrent connections, the cache-index does not work often.

By adding a 'cached_neighbor_idx' to struct nd6_destination_cache_entry, this could be improved (the u8_t of this cache would not even increase the struct's size when hiding it between 'pmtu' and 'age').

Simon Goldschmidt <goldsimon>
Project Administrator


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